Molding-machine



G. H- TALBOT.

MOLDING MACHINE. APPLICATION FILED NOV. 8, I919. 1,349,017, PatentedAug. 10, 1920.

2 SHEETS-SHEET 1- Fig. 1.

Inventor. George H. TalboT byM Wuf Artya PATENT OFFICE.

GEORGE H. TALBOT, F NEWTONVILLE, MASSACHUSETTS.

MOLDING-MACHINE.

Application filed November 8, 1919.

To all whom it may concern.

Be it known that I, Gnonon H. TALBOT, a citizen of the United States,and resident of Newtonville, county of Middlesex, State ofMassachusetts, have invented an Improvement in Molding-Machines, ofwhich the following description, in connection with the accompanyingdrawing, is a specifica-tion, like characters on the drawingrepresenting like parts.

This invention relates to improvements in molding machines for formingblocks from plastic material and the principal object thereof is toprovide a simplified type of molding machine in which the article.

may be readily subjected to a powerful pressure necessary to form themolded article and in which the molded article can be readily removed.from the mold.

More specifically the invention relates to machines for molding cementor concrete blocks which can be transported from place to place andutilized by an ordinary unskilled workman to mold uniform blocks. Inmachines which have heretofore been constructed for molding cementblocks it has been customary to provide a knock-clown type of mold inwhich the sides of the mold can be removed or swung aside to enable thepallet which forms a false bottom for the mold to be removed with themolded block upon it. In such constructions the pivoted supports orconnections between the sides and the body of the mold rapidly becomeworn so that the sides are not properly held in place and the molding ofa perfect block is pre vented.

One of the objects of the present invention is to provide a mold inwhich the mold sides may be rigidly secured together and the moldedblock removed through the top of the mold. g

A further object of the invention consists in providing a mold having abottom and three rigid sides with one side which may be so connectedthereto as to be removable to permit the use of a false side or facingplate when it is desired to form the block with a'special design facesuch as a roughened face to simulate a cut stone.

A further object of the invention is to provide a verticallyreciprocating mold having a pallet forming a false bottom for the moldand adapted to be removed with the Specification of Letters Patent.

Patented Aug. 10, 1920. Serial No. 336,708.

molded block upon it, with mechanism for reciprocating the mold soconstructed that the mold may be raised above or lowered below a fillingposition means being provided to support the pallet when themold isdepressed below filling position and thereby force the molded articleout through the top of the mold.

A further object of the invention is to provide a molding machine havinga reciprocating mold with a follower which may be moved into or out ofoperative relation to the path of the mold, thereby avoiding anyobstruction to the filling of the mold or the removal of the palletsupporting the molded block when the reciprocating mold has beendepressed below molding position.

A further object of the invention is to provide means for reciprocatingthe mold which can be operated rapidly to raise the -mold toward andfrom filling position and to provide a supplemental means whereby greatpower may be applied to compress the material between the mold and thefollower.

This is accomplished in the present invention by means of a rack andpinion for moving the mold toward and from the follower and asupplemental power applying lever adapted to be connected to the pinionshaft when the mold is in operative relation to the follower therebyenabling the operator to force the mold againstthe follower with a mostpowerful pressure.

A further feature of the invention comprises the introduction of variousadjustments which will enable the parts of the molding machine to beconveniently assembled into proper operative relation and maintained insuch relation notwithstanding any wear or distortion which may occurduring the operation of the machine.

Other objects and features of the invention will more fully appear fromthe following description and the accompanying drawings and will bepointed out in the an nexed claims.

A preferred embodiment of the invention is disclosed herein as appliedto a machine for molding cement blocks or other articles of likecharacter.

In the drawings:

Figure 1 is a transverse central vertical sectional view of a machineembodying my invention, certain portions ofthe machine being shown inelevation,

Fig. 2 is a front elevation of the machine, and, V

Fig. 3 is a detail view of the mechanism for operating the pinion shaftshowing the means for detachably connecting the power applying lever tothe shaft.

The molding machine illustrated inthe accompanying drawings comprises askeleton frame which desirably may have substantially A-shaped-ends,comprising legs 1, 2, top members 3 connecting the upper ends of saidlegs and brace bars l, connecting the legs intermediate of their ends,which are desirably formed of angle iron for rigidity in constructionand to provide a convenient anchorage for transverse plates 5 and 6which connect the A-shaped ends together. The mold is carried upon theupper end of a. rack 7 which is reciprocably mounted in suitable ways 8which are secured to the transverse plates 5 and 6. r V

The rack 7 is provided at its upper end with an extension 9, which isseated in a boss 10 projecting downwardly from the bottom 11 of themold, and is secured in said boss by a set screw 12. The mold comprisesthe bottom 11, ends 13, I l and a rear side '15 allof which may beintegral or rlgidly secured together. The front side 16 of the mold mayalso be formed rigidly with theother sides and bottom of the mold, butpreferably is hinged thereto in order to enable the use of a false sideor facing plate, as it is frequently desirable to form blocks hav ing aface which simulates cut stone or bears some conventional design.

r In the preferred construction shown here in the front side 16 isprovided with a plurality of bosses 17 which extend below the bottom ofthe mold and are pivotally mounted upon a rod or shaft 13 which iscarried in bosses 19 extending downwardly from the bottom of the moldand projecting beyond the front edge of the bottom of the mold. By thuslocating the pivotal axis, about which the front of the mold is swungbelow the bottom of the mold all portions of the front of the mold will,when swung about the pivotal axis, move substantially horizontally awayfrom the molded article, thus enabling the molded block to be dischargedthrough the open top of the mold with the face plate upon it, orpermitting the facing plate to be removed before the block isdischarged.

Any convenient means may be provided for securing the movable mold facein molding position and for permitting its removal therefrom. Asillustrated herein arms 20, 21 are secured respectively to the ends 13,14: and project a considerable distance beyond the front of the mold andare connected by a transverse rod 22 which serves as a pivot for alocking lever or latch. This lever desirably comprises a plurality ofparallel members 23 having. cam faced ends 24 which engage the outerface of the front plate 16 of the mold. The opposite ends of the members23 are connected by a rod 23 which lever is pivoted, thereby providingan effective lock. l/Vhen the lever is raised the cam face permits thefront to be swung outwardly so that the block with the facing plate uponit maybe discharged from the mold.

lliensual pallet 27 is provided for en abling the molded block to beraised from the mold and transportedto' such place as is required forthe proper drying or halting of the block and the pallet thereforesubstantially conforms to the bottom of the mold and is adapted to formthe false base of the mold.

' In the use of the mold having rigid sides as above described it isnecessary to have means for removing the block from the mold. Thepresent invention contemplates providing means for reciprocating'themold which will enable the mold to be held in a filling position inwhich the pallet 27 will rest upon the bottom 'of the mold, thenelevating the mold into cooperation with a follower which will serve tocompress the material in the mold and finally lowering the mold suhiciently to cause the pallet with the molded block upon it to be forcedthrough the top of the mold. This is accomplished by providing a seriesof pallet supporting rods 28 which extend telescopically throughapertures in the bottom 11 of the mold, and through bosses 29 extendingdownward from the bottom, and are supported at their lower ends uponbrackets 30 connected to the top plates 3 of the end frame.

In order to provide for compression of the material in the mold and toremove any obstruction to the filling of the mold or the removal of themolded blocks therefrom, a pivotally supported follower is providedwhich maybe moved into cooperative relation to the path of the mold orswung away ends of the rods 34, which engage the under and upper facesof the follower supporting plate 35.

The follower 38 is of a form to correspond to that of the mold and isconnected to the follower supporting plate by a spacing member 39 whichhas screw threaded stems 4C0 projecting upwardly therefrom through slotsell which extend longitudinally of the central portion of the followersupporting plate, the studs being provided with clamping nuts l2 forsecur ing the same in adjusted position.

By reason of this construction the follower may be adjustedlongitudinally of the supporting plate in such a manner as to positionit properly in respeet'to the )ath of the ends of the mold. In order toprovide for the proper positioning of the follower over the mold whenthe same is swung into cooperative relation to the mold the blocks 31are provided with extensions 4:3 having screws 4E4 adjustably mountedtherein and adapted to engage the members 3 of the frame. By adjustingthese screws the swing ing movement of the follower may be so limited asto position it directly over the path of the mold so that when the moldis raised it will telescope over the follower.

Any suitable means may be provided for actuating the rack to reciprocatethe mold. A convenient means comprises a pinion which is fixedly securedupon a shaft l6 journaled in the downwardly extending webs of the topplates 3 and provided with a crank 47 which may be turned by theoperator to raise and lower the mold. A relatively short crank may beemployed for rais ing and lowering the mold quickly in order to placethe mold in filling position and to lower it for the purpose ofdischarging the block through the top. of the mold.

In order to provide means for applying the powerful pressure required tocompress the material of the block supplemental power applying lever 4L8is pivotally mounted upon the pinionshaft 46 and is provided with meansby which it may be detachably secured to the pinion shaft. Theparticular means illustrated comprises a disk .419 fixedly secured uponthe pinion shaft 46 having one or more notches 50 which may be engagedby a bolt 51 slidably mounted in lugs or keepers 52 projecting from theside of the lever 4:3. The bolt 51 is connected by a link to a hand grip54 which is pivotally mounted adjacent the handle portion 55 of thelever.

A bracket 56 upon the top bar 3 of the frame extends in the path of thelever 4-8 and is so posi ioned that when the mold is in filling positionthe bolt 51 will be forced into the notch 50 of the disk %9.

In the operation of the machine the ep- 4S and rotates it in acounterclockwise direction thereby raising the mold and forcing thematerial therein against the follower until the block is compressedsufficiently. The lever is then moved in the reverse direction until themold again assumes filling position when the follower support is swungaside. The operator then grasps the hand grip 5st and releases the bolt51 from engagement with the notch 50 at the same time taking hold of thecrank and rotating it in a clockwise direction to lower the mold. lVhenthe mold is in filling position the upper ends of the rods 28 engage thepallet 27 so that as the mold is lowered the pallet with the block uponit is forced upwardly through the top of the mold. The operator can thentake hold of the pallet and remove the molded block.

If the facing plate is used the locking lever 23 will of course beactuated to permit the movable side of the mold to be swung outwardlywhile the mold is in filling position so that the withdrawal of the moldfrom the block will not injure the face of the mold.

It will be understood that the embodiment of the invention disclosedherein is illustrative and not restrictive and that vari ousmodifications in construction and arrangement of parts may be madewithin the spirit and scope of the following claims.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is:

l. A molding machine comprising a frame, a mold having a removablepallet normally carried by the bottom of the mold recipro cably mountedthereon, means for reciprocating said mold, a follower and means forselectively positioning said follower in operative relation to the moldand for removing the same from said operative relation to permit fillingof the mold and removal of the molded article, means for reciprocatingsaid mold toward and from said follower and means for discharging thepallet w'th the molded ZIIblClB thereon from said mold.

2. A molding machine comprising a frame, a vertically reciprocable moldhaving a removable pallet normally carried by the bottom of the mold, afollower, a follower support pivotally mounted upon said frame andmovable to position said follower into and out of operative relation tosaid mold and means for reciprocating said mold toward and from saidfollower and means for discharging the pallet with the molded articlethereon from the mold.

to cause the follower to register with the mold and means forreciprocating said mold toward and from said follower.

4. A molding machine comprising a frame, a vertically reciprocablemold,va follower support comprising blocks pivotally mounted on saidframe, a follower supporting plate, a follower adjustably secured tosaid supporting plate at a distance therefrom, tension membersconnecting said follower supporting plate to saidblocks and means forreciprocating said mold toward and from said follower.

5. A molding machine comprising a frame, a vertically reciprocable mold,a follower support comprising blocks pivotally mounted on said mainframe,'set screws adjustably mounted on said blocks adapted to engagesaid frame to limit the swinging movement of said blocks, a followersupporting'plate,

a follower secured to said plate at a distance therefrom, tensionmembers connecting said follower supporting plate to said blocks andmeans for reciprocating said mold toward and from said follower.

6. A molding machine comprising a frame, a mold reciprocable verticallyrelatively thereto having a'removable pallet normally carried by thebottom of the mold, a follower, means for positioning said follower intoand out of operative relation to said mold, means for reciprocating saidmold upwardly from filling position into cooperative relation to saidfollower and operable to depress said mold below filling position andmeans for raising said pallet from said mold when the mold is depressedbelow filling position whereby the molded article will be forced fromthe mold.

7. A molding machine comprising a frame, a mold having a bottom and endsand sides rigid therewith, a pallet normally carried by the bottom ofsaid mold, a follower, means for positioning said follower into and outof operative relation to said mold, means for moving said mold upwardlytoward said follower into cooperative relation thereto, rodstelescopically mounted in the bottom of said mold adapted to engage saidpallet when the mold is depressed below filling position to force themolded article from said mold.

8. A molding machine comprising a frame, a mold, a rack secured to saidmold mounted in ways in said frame, a pinion engaging said rack, andmeans for actuating said pinion to cause said rack to reciprocate saidmold, a follower and meansfor positioning 9. A molding machinecomprising a frame, a

a mold, a rack secured to said mold, mounted in Ways in said frame, apinion engaging said rack, a pinion shaft having a crank thereonoperable to rotate said pinion to reciprocate said mold, a powerapplying lever pivotally mounted on said shaft, means for connecting andreleasing said power applying lever from said shaft and a follower incooperative relation to said mold.

10. A molding machine comprising a frame, a mold, a rack secured to saidmold mounted in ways in said frame, a pinion engaging said rack, apinion shaft having a crank thereon operable to rotate said pinion toreciprocate said mold, a notched disk fixedly secured to said pinionshaft, a power applying lever pivotally mounted on said shaft and meanscarried by said lever adapted to be engaged and disengaged from thenotch in said disk and a follower in cooperative relation to said mold.

11. A .molding machine comprising a mold having a bottom and sides andan open top, a removable pallet carried by said bottom' one of saidsides being movable laterally to permit-the molded block to be readilydischarged, and means for discharging the pallet with the molded blockthereon from said mold.

12. A molding machine comprising a mold having a bottom, three sidesrigid therewith and a fourth side pivotally secured to said bottom uponan axis located below the plane'of the bottom, whereby a facing platemay be supported by said movable mold side and the movable mold sideswung outwardly to permit the molded block to be discharged through thetop of the mold with the facing plate adhering thereto and 'means fordischarging the molded block from the mold.

13. In a molding machine comprising a' mold having a bottom, three sidesrigid therewith and a fourth side pivotally secured to said bottom uponanaXis located below the plane of the bottom, whereby a facing plate maybe supportedby said movable mold side and the movable side swungoutwardly ,to permit the mold block to be discharged through the top ofthe mold with the facing plate adhering thereto, latching meanscomprisinga lever pivotally connected to the ends of the mold and havinga cam faced end engagingthe outer wall of said movable side operable tolock the movable side in molding position or to enable the same to be,swung outwardly, and means for discharging the molded block through thetop of the mold.

14. In a molding machine comprising a mold having a bottom, three sidesrigid therewith and a fourth side pivotally secured to said bottom uponan axis located below the plane of the bottom, whereby a facing platemay be supported by said movable mold side and the movable side swungoutwardly to permit the molded block to be discharged through the top ofthe mold with the facing plate adhering thereto, latching meanscomprising arms extending laterally from the ends of the mold, a rodmounted in said arms, a plurality of levers pivotally mounted on saidrod having cam faced ends adapted to engage the outer wall of themovable side of the mold and a handle connecting said levers togetherwhereby said levers may be operated to lock the mold side in moldingposition or to enable it to be swung outwardly and means for dischargingthe molded block from the mold.

15. A molding machine comprising a frame, a vertically reciprocablemold, a follower support comprising blocks pivotally mounted on saidframe, a follower supporting plate, a follower adjustably secured tosaid supporting plate at a distance therefrom, tension members connectedto said blocks and adjustably connected to said follower supportingplate and means for reciprocating said mold toward and from saidfollower.

In testimony whereof I have signed my name to this specification.

GEORGE H. TALBOT.

